This could be triggered when passing an array with "holes" to variadic commands.
Connection classes based on the protocol serialized exposed by phpiredis were
not affected by this bug.
Fixes#316.
When iterating a hash containing integer fields our iterator abstraction
based on HSCAN was always returning "0" as a field name after the first
$field => $value pair due to a wrong assumption on how the PHP function
array_shift() (which is used internally to advance to the next pair in
our buffered response to HSCAN) works.
The ZSCAN-based iterator had this very same bug which was already fixed
in 24e19a9 so I am not sure how this one went unnoticed until now.
Using IPv6 with Predis was basically impossible due to various inconsistencies
and bugs through the library, now it is supported by all the connection classes.
Following the standard for IPv6 literal addresses in URI strings, the IP literal
must be enclosed within square brackets when passing the parameters as a string:
$parameters = 'tcp://[2001:db8:0:f101::1]:6379';
See https://tools.ietf.org/html/rfc3986#section-3.2.2 for further details.
This commit also fixes#239 making redis-cluster usable with nodes using IPv6.
Instead of using "unix://" you should just use "unix:":
$old = 'unix:///path/to/redis.sock';
$new = 'unix:/path/to/redis.sock';
The old format should be considered obsolete and will not be supported
starting from the next major release of Predis.
Meh
This is handy for accessing remote Redis instances over a secure SSL connection
which is currently a popular option or even requirement with many cloud hosting
environments.
In order to configure the client to use an SSL-encrypted connection the scheme
in the connection parameters must be either "tsl" or "rediss" and a set of SSL
options (see http://php.net/manual/en/context.ssl.php) must be provided via the
"ssl" parameter as a named array.
The following example (which does not necessarily represent an example of good
practices!) illustrates how to set the "ssl" parameter using a named array and
the equivalent URI string:
// Parameters as named array
$parameters = [
'scheme' => 'tls',
'host' => '127.0.0.1',
'ssl' => [
'cafile' => '/home/adaniele/redis.pem',
'verify_peer_name' => false,
],
];
// Parameters as URI string
$parameters = 'tls://127.0.0.1?ssl[cafile]=redis.pem&ssl[verify_peer_name]=1';
Support for SSL is currently limited to the Predis\Connection\StreamConnection
backend but we intend to investigate if it is possible to extend this feature
to Predis\Connection\PhpiredisStreamConnection in the future.
Be aware that using encrypted connections may lead to a performance degradation
especially in the connect() operation due to the overhead of the TLS handshake.
Unfortunately there is no real way to reuse SSL sessions from userland, aside
from enabling persistent connections, but this will work only on PHP >= 7.0.0
because previous versions of PHP do not provide enough info about a stream from
get_stream_meta_data().
NOTE: Redis does not have built-in support for SSL-encrypted connections, but if
you want to expose it to public networks you may want to rely on "stunnel".
Falling back to a default timeout values should be done by the connection class
as it is an implementation detail that may vary depending on the backend.
These parameters augment the set of user-supplied parameters when creating a new
connection, but they do not override specific parameters when already defined.
An example of self-contained configuration using client options:
$client = new Predis\Client('tcp://127.0.0.1', [
'parameters' => [
'timeout' => 10,
],
'connections' => function ($options) {
$factory = $options->getDefault('connections');
$factory->setDefaultParameters($options->parameters);
return $factory;
},
]);
This change will be useful for both redis-cluster and redis-sentinel as it makes
it easy to apply shared parameters such as a common password for authentication
when the server returns one ore more new nodes from response (think of -MOVED).
stream_socket_client() has the undocumented ability to open different persistent
streams by providing a path in the $address string. Previously we supported this
behaviour with a combination of "persistent" and "path" (see #139) but this can
be confusing, especially now that we support the redis:// scheme which uses the
path part of an URI string to specify a database number.
After this change, instead of using an URI string such as:
$parameters = 'tcp://127.0.0.1/first?persistent=1&database=5';
You should use the following ones:
$parameters = 'tcp://127.0.0.1?persistent=first&database=5';
$parameters = 'redis://127.0.0.1/5?persistent=first';
Avoiding "path" makes even more sense when using array connection parameters:
$parameters = [
'host' => '127.0.0.1',
'database' => 5,
'persistent' => 'first',
]
This feature is not supported when using UNIX domain sockets because the path
trick of stream_socket_client() does not play well with the actual path of the
socket file. The client will throw an InvalidArgumentException exception to
notify the user.
NOTE: unfortunately we have to disable the tests for persistent connections when
running under HHVM due to a bug in their implementation of get_resource_type()
preventing us to recognize a persistent stream from userland code.
Starting with Redis 3.0.3 the EXISTS command is variadic so that it is
possible to check for the existence of multiple keys in one request,
with the server returning the number of keys found.
This change could break codebases relying on strict comparison (===)
against a boolean value, but just doing $redis->exists('key') == TRUE
is totally fine.
Daniele Alessandri
Remi Collet